ASTM C331-05

Standard Specification for Lightweight Aggregates for Concrete Masonry Units

ABSTRACT
This specification covers lightweight aggregates intended for use in concrete masonry units when a prime consideration is to reduce the density of the units. Three general types of lightweight aggregates are covered by this specification: aggregates prepared by expanding, palletizing, or sintering products such as blast-furnace slag, clay, diatomite, fly ash, shale, or slate; aggregates prepared by processing natural materials such as pumice, scoria, or tuff; and aggregates consisting of end products of coal or coke combustion. The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material. The aggregates shall not contain excessive amounts of deleterious substances, as determined by organic impurities, staining, and loss on ignition tests. Lightweight aggregate under test shall meet requirements for clay lumps and friable particles, uniformity of grading, loose bulk density, uniformity of loose bulk density, popouts, resistance to freezing and thawing, and drying shrinkage.
SCOPE
1.1 This specification covers lightweight aggregates intended for use in concrete masonry units when a prime consideration is to reduce the density of the units.
1.2 The values stated in SI units are to be regarded as the standard. The values shown in parentheses are for information purposes only.
1.3 The text of this specification references notes and footnotes which provide explanatory materials. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

General Information

• Status: Historical
• Publication Date: 14-Dec-2005
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.21 - Lightweight Aggregates and Concrete

Relations

• Replaces: ASTM C331-04 - Standard Specification for Lightweight Aggregates for Concrete Masonry Units
• Effective Date: 15-Dec-2005
• Replaced By: ASTM C331/C331M-10 - Standard Specification for Lightweight Aggregates for Concrete Masonry Units
• Effective Date: 15-Dec-2010
• Referred By: ASTM C1790-21 - Standard Specification for Fly Ash Facing Brick
• Effective Date: 15-Dec-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C331 – 05
Standard Specification for
1
Lightweight Aggregates for Concrete Masonry Units
This standard is issued under the fixed designation C331; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* C702 Practice for Reducing Samples of Aggregate to Test-
ing Size
1.1 This specification covers lightweight aggregates in-
C1262 Test Method for Evaluating the Freeze-Thaw Dura-
tended for use in concrete masonry units when a prime
bility of Dry-Cast Segmental Retaining Wall Units and
consideration is to reduce the density of the units.
Related Concrete Units
1.2 The values stated in SI units are to be regarded as the
D75 Practice for Sampling Aggregates
standard. The values shown in parentheses are for information
purposes only.
3. Aggregate Types
1.3 The text of this specification references notes and
3.1 Three general types of lightweight aggregates are cov-
footnotes which provide explanatory material. These notes and
ered by this specification, as follows:
footnotes (excluding those in tables and figures) shall not be
3.1.1 Aggregates prepared by expanding, pelletizing, or
considered as requirements of the standard.
sintering products such as blast-furnace slag, clay, diatomite,
2. Referenced Documents fly ash, shale, or slate, and
2
3.1.2 Aggregates prepared by processing natural materials,
2.1 ASTM Standards:
such as pumice, scoria, or tuff, and
C29/C29M Test Method for Bulk Density (“Unit Weight”)
3.1.3 Aggregates consisting of end products of coal or coke
and Voids in Aggregate
combustion.
C40 Test Method for Organic Impurities in FineAggregates
3.2 The aggregates shall be composed predominately of
for Concrete
lightweight-cellular and granular inorganic material.
C114 Test Methods for Chemical Analysis of Hydraulic
Cement
4. Chemical Composition
C136 Test Method for Sieve Analysis of Fine and Coarse
4.1 Lightweight aggregates shall not contain excessive
Aggregates
amounts of deleterious substances, as determined by the
C142 Test Method for Clay Lumps and Friable Particles in
following limits:
Aggregates
4.1.1 Organic Impurities (Test Method C40)—Lightweight
C151 Test Method for Autoclave Expansion of Hydraulic
aggregates subjected to the test for organic impurities that
Cement
produce a color darker than the standard shall be rejected,
C157/C157M Test Method for Length Change of Hardened
unless it is demonstrated that the discoloration is due to small
Hydraulic-Cement Mortar and Concrete
quantities of materials not harmful to the concrete.
C641 Test Method for Iron Staining Materials in Light-
4.1.2 Staining (Test Method C641)—An aggregate produc-
weight Concrete Aggregates
ing a stain index of 60 or higher shall be rejected when the
deposited stain is found upon chemical analysis to contain an
1 iron content, expressed as Fe O equal to or greater than 1.5
2 3
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee mg/200 g of sample.
C09.21 on Lightweight Aggregates and Concrete.
4.1.3 Loss on Ignition (Test Methods C114)—Loss on igni-
Current edition approved Dec. 15, 2005. Published January 2006. Originally
tion of aggregates, consisting of end products of coal or coke
approved in 1953. Last previous edition approved in 2004 as C331–04. DOI:
combustion, shall not exceed 12 %. Loss on ignition of other
10.1520/C0331-05.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
aggregates shall not exceed 5 %.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
NOTE 1—Some aggregates may contain carbonates or water of hydra-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tion that contribute to loss on ignition but may not affect the quality of the
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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C331 – 05
product.Therefore,whenevaluatinganaggregate,considerationshouldbe
5.2.3 Drying Shrinkage—Drying shrinkage of concrete
given to the material characteristics that cause the ignition loss.
specimens prepared and tested in accordance with 8.6 shall not
exceed 0.10 %.
5. Physical Properties
5.1 Lightweight aggregate under test shall meet the follow-
6. Sampling
ing requirements:
6.1 Sample lightweight aggregates in accordance with
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C331–04 Designation: C 331 – 05
Standard Specification for
1
Lightweight Aggregates for Concrete Masonry Units
This standard is issued under the fixed designation C 331; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification covers lightweight aggregates intended for use in concrete masonry units when a prime consideration is
to reduce the density of the units.
1.2 The values stated in SI units are to be regarded as the standard. The values shown in parentheses are for information
purposes only.
1.3 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C 29/C 29M Test Method for Bulk Density (“Unit Weight”)(Unit Weight) and Voids in Aggregate
C40 Test Method for Organic Impurities in Fine Aggregates for Concrete
C114 Test Methods for Chemical Analysis of Hydraulic Cement
C 136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C 142 Test Method for Clay Lumps and Friable Particles in Aggregates
C 151 Test Method for Autoclave Expansion of PortlandHydraulic Cement
C 157/C 157M Test Method for Length Change of Hardened Hydraulic-Cement, Mortar, and Concrete
C 641 Test Method for Iron Staining Materials in Lightweight Concrete Aggregates
C 702 Practice for Reducing Samples of Aggregate to Testing Size
C 1262 Test Method for Evaluating the Freeze-Thaw Durability of Manufactured Concrete MasonryDry-Cast Segmental
Retaining Wall Units and Related Concrete Units
D75 Practice for Sampling Aggregates
3. Aggregate Types
3.1 Three general types of lightweight aggregates are covered by this specification, as follows:
3.1.1 Aggregates prepared by expanding, pelletizing, or sintering products such as blast-furnace slag, clay, diatomite, fly ash,
shale, or slate, and
3.1.2 Aggregates prepared by processing natural materials, such as pumice, scoria, or tuff, and
3.1.3 Aggregates consisting of end products of coal or coke combustion.
3.2 The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material.
4. Chemical Composition
4.1 Lightweight aggregates shall not contain excessive amounts of deleterious substances, as determined by the following
limits:
4.1.1 Organic Impurities (Test Method C 40)—Lightweight aggregates subjected to the test for organic impurities that produce
a color darker than the standard shall be rejected, unless it is demonstrated that the discoloration is due to small quantities of
materials not harmful to the concrete.
4.1.2 Staining (Test Method C 641)—An aggregate producing a stain index of 60 or higher shall be rejected when the deposited
1
This specification is under the jurisdiction ofASTM Committee C09 on Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee C09.21 on
Lightweight Aggregates and Concrete.
Current edition approved Jan. 1, 2004. Published February 2004. Originally approved in 1953. Last previous edition approved in 2003 as C331–03a.
Current edition approved Dec. 15, 2005. Published January 2006. Originally approved in 1953. Last previous edition approved in 2004 as C 331–04.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
C331–05
stain is found upon chemical analysis to contain an iron content, expressed as Fe O equal to or greater than 1.5 mg/200 g of
2 3
sample.
4.1.3 Loss on Ignition (Test Methods C 114)—Loss on ignition of aggregates, consisting of end products of coal or coke
combustion, shall not exceed 12 %. Loss on ignition of other aggregates shall not exceed 5 %.
NOTE 1—Someaggregatesmaycontaincarbonatesorwaterofhydrationthatcontributetolossonignitionbutmaynotaffectt
...